Business Insider put together a list of commonly overpriced products, according to Consumer Reports' senior projects editor Tod Marks. While some of them are straightforward—convenience foods, for instance—the list includes some surprising items:

Products with new features. Companies are hoping you'll spring for the newest thing. "Maybe a water bottle with new spout, or a diaper with new, innovative closure — anything that you see new convenience features," says Marks.

Fortified food products. Making existing foods "healthier" is a huge opportunity for food and beverage companies, who recognize that your desire to live a long and healthy life conflicts horribly with your reluctance to give up potato chips. Be suspect of anything "maybe with a new ingredient, a fortified product — something like baked potato chips," Marks cautions.

Economy-sized products. The point of buying in bulk is ostensibly for the consumer to save by buying more at a time, but Marks mentions he's seen instances where the larger size wasn't actually any cheaper. "The only way to tell is to look at the unit price labels, beneath the price on each product," he explains. "By and large, it's still true, but there are plenty of examples of other sizes being cheaper based on promotional activity or what's on sale at any given time."